COMIC *Official* Jigoku Shoujo Thread

Unfortunately, this anime is subbed yet, but I heard Shinsen Subs will be picking it up soon.

Here's some short information about it from AniDB

There is a rumor. There exists a message board called “Jigoku Tsushin” where one can access only at midnight. It is said that if one writes his grudge against someone, Jigoku Shoujo appears and she takes the person to the Hell.

Pics of episode 1 and possible spoilers, so just glance at them

Here's a spoiler summary of episode 1 thanks to RandomC

Hashimoto Mayumi becomes the victim of bullying after she loses some fund-raising money and has to rely on another girl, Kuroda Aya, for help. While fetching drinks for Aya, Mayumi hears of a dangerous website called the 地獄通信 (Jigoku Tsuushin, or Hell Communication). Mayumi visits the site that night at midnight, and it prompts her to enter the name of the one she has a grudge against. She types in Aya’s name, but is too afraid to click the submit button. The next day, after being physically abused by Aya, Mayumi actually submits the name. She immediately gets a confirmation message on her cell phone from the Hell Girl. Nothing happens to Aya though, and the bullying continues. Aya forces Mayumi to hit on guys for money, but Mayumi back away from it though not before Aya gets an incriminating photo. At wits end, Mayumi decides to commit suicide by jumping off a building. However, on the way down, she is met by a girl who takes her to an alternate red world. The Hell Girl identifies herself as Enma Ai. She gives Mayumi a straw doll, and tells Mayumi that pulling the red string off the doll will take care of the person that she hates. However, there is a price to pay: when the string puller dies, his or her soul will also go to hell, forever to be in pain and anguish. The next day at school, Mayumi experiences the final straw in the form of her teacher getting the picture Aya took of Mayumi the night before. Mayumi goes to the rooftop and pulls off the string. A strong wind immediately blows the doll out of her hand, and it disintegrates. That night, Aya, who gets called to school, sees Mayumi. She chases her inside, but loses sight of her. As she searches from room to room, she sees several horrors, from a faceless classroom to her friends being swallowed up by the wall. She finally ends in a classroom where she meets several creepy looking characters, including Ai. The flower pattern on Ai’s kimono knocks her out, and she wakes up in a boat, being rowed through the gates of Hell by Ai. The next day, Mayumi seems a lot happier, but she is forever branded with a symbol on her chest that serves to remind her of her eventual fate.